15908091864 has 192 divisors, whose sum is σ = 48400934400. Its totient is φ = 4336206336.

The previous prime is 15908091863. The next prime is 15908091907. The reversal of 15908091864 is 46819080951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15908091863) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19663492 + ... + 19664300.

It is an arithmetic number, because the mean of its divisors is an integer number (252088200).

Almost surely, 2^15908091864 is an apocalyptic number.

15908091864 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15908091864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24200467200).

15908091864 is an abundant number, since it is smaller than the sum of its proper divisors (32492842536).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15908091864 is a wasteful number, since it uses less digits than its factorization.

15908091864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1582 (or 1571 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 51.

The spelling of 15908091864 in words is "fifteen billion, nine hundred eight million, ninety-one thousand, eight hundred sixty-four".